We publish a substitute list only where a record says what kind of product it is. Letta's does not yet, so this page names none. The AI / ML category lists every offer we track alongside it.
Current Letta Situation
Risk Level:source unconfirmed
Why: When we last read the page we cite for Letta, on 2026-11-13, we refused the change we considered recording because it named no figure that had moved, and refusing a change is not a confirmation of the terms we publish for it. We are not publishing a stability judgement for it until that is fixed.